JP3052840B2 - Electric cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric cooker for use in ordinary households such as grilled fish and the like, and more particularly to a structure having improved smoke purification performance.

[0002]

2. Description of the Related Art Since a large amount of smoke is generated in an electric cooker for grilling fish, it is a major issue how to purify the smoke.
In recent years, various electric cookers provided with a catalyst for purifying smoke have been developed.

Hereinafter, a conventional electric cooker provided with a catalyst will be described. FIG. 9 shows the configuration of a first conventional electric cooker. In FIG. 8, the upper case 1 is placed on the lower case 2, and the legs 3 are attached to the lower case 2. Reference numeral 4 denotes a grill which is removably mounted on the lower case 2 and mounts food thereon, 5 denotes an upper heater supported by the upper case 1, 6 denotes a lower heater supported by the lower case 2, Reference numeral 7 denotes an opening provided in the upper part of the upper case 1. On the opening 7, there are provided eight catalysts, and on the catalyst 8, nine auxiliary heaters for heating the catalyst 8.
Reference numeral 0 denotes a catalyst cover covering the catalyst 8 and the auxiliary heater 9, and the catalyst cover 10 is provided with 11 exhaust holes.

[0004] The operation of the electric cooker configured as described above will be described below. First, the fish to be cooked is placed on the grill 4 and the upper heater 5 and the lower heater 6 are heated to bake the fish. For example, in the case of two saury fish, 10 minutes after the start of cooking, smoke starts to be generated from the fish, and the air containing the smoke passes through the opening 8 of the upper case 1 through the catalyst 8 and the catalyst cover 10 It is discharged outside through the exhaust hole 11. At this time, the catalyst is heated by the auxiliary heater 9 and is at a high temperature, and the smoke purification performance is improved.
Because it is purified as it passes through the interior of the house, smoke is eliminated and only hot air is released to the outside.

FIG. 10 shows the configuration of a second conventional electric cooker. In FIG. 9, reference numeral 21 denotes an inner box, 22 denotes a back plate of the inner box 21, 23 denotes a concave portion in the upper rear portion of the inner box 21, and 24 denotes an intake hole provided in the upper rear portion of the inner box 21. 25 is a bottom plate of the inner box, 26 is the inner box 21
It is a grill that can be freely inserted into and removed from the inside.
Is an upper heater in the inner box 21; 28 is a tray placed on the bottom plate 25; 29 is a top plate forming an outer box of the exterior of the inner box 21; 30 is a back plate; It is a lower plate. Reference numeral 32 denotes a leg, which is attached to the lower plate 31.
33 is a front door. Reference numeral 34 denotes a catalyst whose ventilation direction is the front and rear lateral direction. Reference numeral 35 denotes an auxiliary heater provided between the catalyst 34 and the intake hole for heating the catalyst 34. The catalyst 34 and the auxiliary heater 35 are 36 catalysts. Top cover and 37
And is mounted in contact with the upper part of the inner box 23. Reference numeral 38 denotes a fan case connected to a road passage formed by the upper catalyst cover 36 and the lower catalyst cover 37, and a motor 40 provided with a sirocco fan 39 is mounted on the fan case 38.

The operation of the electric cooker configured as described above will be described. When cooking of the fish placed on the grill 26 is started by heating the heater 27, the motor 40 is driven at the same time as the start, and the sirocco fan 39 attached to the motor 40 draws the air in the inner box 21 from the intake hole 24. It is configured to suck. At this time, the heat of the auxiliary heater 35 is sucked toward the catalyst 34, and the temperature of the catalyst 34 rises. Next, a few minutes after the start of cooking, smoke is generated from the fish, and the air in the inner box 21 containing the smoke passes through the catalyst 34 from the intake hole 24 and passes through the opening of the back plate 30. Released outside. The smoke is purified when passing through the catalyst 34, which has a high temperature and improved purification performance,
The smoke disappears and only hot air is released.

[0007]

However, in the electric cooker having the structure of the first conventional example, a large amount of smoke is generated when many fish are grilled at a time or when a fish containing a large amount of oil is grilled. When the smoke passes through the catalyst, there is a problem that the smoke cannot be completely purified and the smoke is released to the outside.

Here, if the mesh holes of the catalyst are reduced to improve the purification performance and the smoke easily contacts the catalyst, it becomes difficult for the smoke to pass through the catalyst, and the smoke flows from between the upper case and the lower case. Will leak. Also, if the length of the catalyst is increased by increasing the size of the reticulated holes in the catalyst to allow smoke to pass therethrough, the temperature of the catalyst decreases, the purification performance decreases, and no effect is obtained.

Further, in the electric cooker of the second conventional example in which smoke is forcibly passed through the catalyst using a motor and a fan,
Although smoke can pass through the catalyst even if the catalyst is lengthened, in this configuration, much heat is radiated from the catalyst and the catalyst cover, and the temperature of the catalyst cannot be raised until it can be completely purified when a large amount of smoke is generated, Therefore, the lower heater is eliminated and only the upper heater is provided so that a large amount of smoke is not generated.
However, it is better to bake fish with both the upper and lower heaters, and there is a problem that if the lower heater is provided in this configuration, smoke cannot be completely purified.

The present invention solves the above-mentioned conventional problems, and provides an electric cooker in which both upper and lower heaters are provided and which completely purifies with a catalyst even if a large amount of smoke is generated during cooking. The purpose is to:

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an auxiliary heater in the vicinity of an intake hole on the outside of a back plate and a catalyst in a ventilation direction below the auxiliary heater on the outside of the back plate. When cooking is started, the catalyst is heated by the auxiliary heater in the vicinity of the auxiliary heater at the start of cooking, and the vicinity of the back plate is heated by heat radiation from the back plate of the heated heat in the inner box. High temperature. Further, even if the temperature of the catalyst rises above the temperature in the inner box, since the back plate is at a high temperature, the heat radiation of the catalyst is suppressed and the temperature can be increased. Therefore, even if the fish is baked with high heating using both the upper and lower heaters, the smoke has completely risen to the temperature at which the catalyst can completely purify the smoke at the time when a large amount of smoke is generated, so that the smoke is completely eliminated. Can be purified.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION
An inner box forming a cooking cabinet, a grille freely placed in and out of the inner box, a saucer placed on the bottom plate of the inner box, and an upper heater provided above the grille in the inner box. ,
A lower heater provided between the grill and the saucer; a plurality of intake holes provided in an upper portion of a back plate of the inner box; an auxiliary heater provided in the vicinity of the intake hole; The catalyst provided, the catalyst cover attached to the back plate while holding the auxiliary heater and the catalyst close to the back plate of the inner box, and the exhaust side of the catalyst in the exhaust passage formed by the back plate and the catalyst cover of the inner box. It is an electric cooker consisting of an intake fan attached to the air conditioner, the heat release of the auxiliary heater and the catalyst is suppressed, the temperature of the catalyst can be easily increased, the purification performance by oxidative decomposition of smoke can be improved, and a large amount of smoke Can be completely purified within the catalyst.

According to a second aspect of the present invention, the auxiliary heater is mounted closer to the back plate of the inner box than the catalyst cover, and the air passing through the intake hole of the back plate is provided between the back plate and the auxiliary heater. The space between the heater and the space between the auxiliary heater and the catalyst cover is almost evenly passed, so that the amount of heat of the auxiliary heater flowing into the catalyst increases, and the heating efficiency of the catalyst can be increased.

According to a third aspect of the present invention, an intake hole in a back plate of the inner box is provided above the auxiliary heater, and heat is radiated from the auxiliary heater through the intake hole into the inner box. Heat can be suppressed, the amount of heat to the catalyst can be increased, and the heating efficiency can be increased.

According to a fourth aspect of the present invention, the upper heater in the inner box is brought close to the suction hole of the back plate, and the heat of the upper heater for cooking in the inner box is transferred to the suction hole of the back plate. , The amount of heat received by the catalyst increases, and the heating efficiency of the catalyst can be increased.

According to a fifth aspect of the present invention, the air intake hole of the inner box is provided at the center of the upper side of the inner box to increase the efficiency of suction of smoke in the inner box. Since the smoke is evenly sucked from both ends of the box, the rotation of the motor can be suppressed, the wind speed of the intake air can be reduced, the time for the smoke to pass through the catalyst can be increased, and the purification performance can be improved.

[0017]

【Example】

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 1 to 3, 5
1 is an inner box forming a cooking cabinet, 52 is a back plate of the inner box 51, and 53 is an intake hole having a diameter of 4 mm at the top of the back plate 52 and 76 holes provided in 4 rows in a horizontal direction. is there. Numeral 54 denotes a grill which is freely attached to and removed from the inner box and on which the food is placed. On the upper portion of the grill 54, two upper heaters 55 are attached to the inner box. 5 at the bottom
6 lower heaters are attached to the inner box.

As the upper heater 55, for example, an iron chrome wire is provided on a silicon carbide tube, and insulators are attached to both ends thereof. As the lower heater 56, a sheath heater is provided. Numeral 57 denotes a bottom plate forming the inner box, on which 58 trays can be freely placed in and out. Reference numeral 59 denotes an upper plate forming an outer box of the outer package of the inner box, 60 denotes a lower plate of the outer box, and legs 61 are attached to the lower plate 60.

Reference numeral 62 denotes a catalyst for purifying by oxidizing and decomposing smoke, and the catalyst 62 has a passage through which the smoke passes, which is arranged vertically. Reference numeral 63 denotes an auxiliary heater disposed above the catalyst 62. The auxiliary heater 63 is formed by disposing an iron chrome wire on a silicon carbide tube and attaching insulators to both ends thereof. 6
The catalyst cover No. 4 holds the insulators at both ends of the catalyst 62 and the auxiliary heater 63, and is attached to the back plate 52 so as to cover the catalyst 62 and the auxiliary heater 63. A 65 air passageway is formed from the intake hole 53 of the airbag to the lower portion of the catalyst 62.

Reference numeral 66 denotes a motor, and 67 denotes a motor 6
The sirocco fan attached to the motor 6
6 is attached to the lower part of 68 fan cases.
The fan case 68 is attached to the exhaust side of the passage 65 of the catalyst cover 64, and the upper part of the fan case 68 is in contact with an opening hole provided in the back plate forming the outer box of 69.

The operation of the electric cooker configured as described above will be described. First, fish is placed on the grill 54 in the inner box, and the upper and lower heaters 55 and 56 are heated and grilled. For example, 4 oily saurys are top heater 55
When both sides are baked at the same time from the lower heater 56, a large amount of smoke and gravy begin to be generated from the fish 10 minutes after the start of cooking. The gravy drops on the tray 58, but at this time, the temperature of the tray 58 is also raised, so that smoke is generated and the inner box is filled with smoke.

At the same time as the start of cooking, the auxiliary heater 6
3 is heated, the motor 66 starts to drive, and the sirocco fan 67 rotates to suck the air in the passage 65, so that the heat of the auxiliary heater 63 flows through the catalyst 62, The catalyst 62 has reached a high temperature 10 minutes after being heated and generating smoke.

Thus, when the air in the inner box containing the smoke passes through the catalyst 62 from the intake hole 53, the catalyst 62 has a performance capable of completely oxidizing and decomposing the smoke in the inner box 51. The air exhausted from the opening hole of the back plate 69 can be only air from which smoke has been completely removed.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to the drawings. In FIG. 4, the auxiliary heater 63 has a structure in which 71 iron chrome wires are disposed on a silicon carbide tube 70 and 72 insulators are attached to both ends thereof. In FIG. The insulator 72 is supported and attached to the catalyst cover 64 in a configuration close to the plate 52.

As a result, the interval between the back plate 52 of the auxiliary heater 63 and the silicon carbide tube 70 of the auxiliary heater 63 is narrower than the interval between the silicon carbide tube 70 of the auxiliary heater 63 and the catalyst cover 64. Of the catalyst cover 64
Although it is easier to pass the vicinity of the back plate 52 than the vicinity, by making 73 smaller than 74, the intake air from the intake hole 53 can pass through the 73 and 74 almost equally, so that the heat of the auxiliary heater 63 is Therefore, the amount of heat received by the catalyst increases, and as a result, the heating efficiency of the catalyst 62 can be increased.

(Embodiment 3) Next, a third embodiment of the present invention will be described with reference to the drawings. In FIG.
The intake hole 53 of the back plate 52 of the inner box is provided above the auxiliary heater 63.

When the auxiliary heater 63 is heated, heat is radiated from the surface of the silicon carbide tube 70. However, if the intake hole 53 is near the silicon carbide tube 70, the temperature in the inner box becomes about 300 ° C. Is heated to 600 to 700 ° C., the heat of the auxiliary heater 63 passes through the intake hole 53 and is taken into the inner box 51. However, in the present invention, by providing the intake hole 53 of the back plate 52 above the auxiliary heater 63, the amount of heat flowing into the inner box 51 can be suppressed, and as a result, the catalyst 62
Heating efficiency can be increased.

(Embodiment 4) Next, a fourth embodiment of the present invention will be described with reference to the drawings. In FIG.
The rear upper heaters of the two upper heaters 55 in the inner box 51 are brought closer to the intake holes 53 of the back plate 52. Accordingly, the amount of heat that the heat of the upper heater 55 flows through the intake hole 53 and flows into the passage 65 increases, and as a result, the heating efficiency of the catalyst 62 can be increased.

(Embodiment 5) Next, a fifth embodiment of the present invention will be described with reference to the drawings. In FIG.
An intake hole 53 is provided at a central portion from both side walls above the back plate 52.

When the suction hole 53 is provided at the end of the back plate 52, it is difficult to suck the smoke at a long distance from the suction hole 53. Therefore, the rotation speed of the motor 66 can be increased or the sirocco fan 67 can be operated. The suction power had to be increased by making it larger. At that time, the speed at which the smoke passed through the catalyst 62 also increased.

However, according to the structure of the present invention, the smoke in the inner box 51 can be evenly sucked from both side walls of the inner box 51, so that the suction force can be suppressed and the wind speed of the intake air becomes slow.
The time required for the smoke to pass through the catalyst 62 can be lengthened, and the purification performance of oxidizing and decomposing the smoke can be improved.

[0032]

As is apparent from the above embodiment, according to the first aspect of the present invention, by disposing the catalyst and the auxiliary heater for heating the catalyst close to the inner box, the heat release of the auxiliary heater and the catalyst can be reduced. Thus, the catalyst can be easily heated to a high temperature, the purification performance by oxidative decomposition of smoke can be improved, and an excellent electric cooker that can completely purify the inside of the catalyst even if a large amount of smoke is generated can be realized.

According to the second and third aspects of the present invention, it is possible to suppress the heat release of the heat of the auxiliary heater to parts other than the catalyst, to increase the amount of heat applied to the catalyst, and to improve the smoke purification performance. In the case of a configuration in which a sufficient amount of heat for heating the catalyst is obtained, the heating power of the auxiliary heater can be reduced.

According to the fourth aspect of the present invention, by using the heat radiation of the upper heater in the inner box other than the heating and cooking of the fish for heating the catalyst, the heating effect of the catalyst is improved and the smoke purification performance is improved. be able to.

According to the fifth aspect of the present invention, the smoke in the inner box can be sucked into the catalyst with a weak suction force, whereby the motor can be reduced in size and capacity, and the sirocco fan can be reduced in size. The product can be made more compact and the product can be manufactured at lower cost.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electric cooker according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the electric cooker from behind.

FIG. 3 is a partial cross-sectional view of the back right portion of the electric cooker.

FIG. 4 is a sectional view of an auxiliary heater according to a second embodiment of the present invention.

FIG. 5 is a side sectional view of the electric cooker.

FIG. 6 is a side sectional view of an electric cooker according to a third embodiment of the present invention.

FIG. 7 is a side sectional view of an electric cooker according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view of an electric cooker according to a fifth embodiment of the present invention as viewed from the rear.

FIG. 9 is a side sectional view of a first conventional electric cooker.

FIG. 10 is a side sectional view of a second conventional electric cooker.

[Explanation of symbols]

 REFERENCE SIGNS LIST 51 inner box 52 back plate 53 intake hole 54 grill net 55 upper heater 56 lower heater 57 bottom plate 58 tray 62 catalyst 63 auxiliary heater 64 catalyst cover 65 road passage 66 motor 67 sirocco fan 69 back plate

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Katsuya Tanioka 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. In-company (56) References JP-A-5-172345 (JP, A) JP-A-4-169716 (JP, A) JP-A-4-203811 (JP, A) (58) Fields investigated (Int. . ^7, DB name) A47J 37/06 F24C 15/20

Claims (5)

(57) [Claims] 1. An inner box forming a cooking cabinet, a grille freely placed in and out of the inner box, a tray placed on a bottom plate of the inner box, and an upper portion of the grille in the inner box. An upper heater provided, a lower heater provided between a grill and a saucer, a plurality of intake holes provided on an upper portion of a back plate of an inner box, an auxiliary heater provided near the intake hole, and the auxiliary heater A catalyst provided with a ventilation direction in the lower part of the inner box, a catalyst cover attached to the back plate while holding the auxiliary heater and the catalyst close to the back plate of the inner box, and an exhaust gas comprising the back plate and the catalyst cover of the inner box. An electric cooker comprising an intake fan mounted on the exhaust side of the catalyst in the passage. 2. The electric cooker according to claim 1, wherein the auxiliary heater is mounted closer to the back plate of the inner box than the catalyst cover. 3. The electric cooker according to claim 1, wherein an intake hole in a back plate of the inner box is provided above the auxiliary heater. 4. The electric cooker according to claim 1, wherein an upper heater in the inner box is close to an intake hole of the back plate. 5. The electric cooker according to claim 1, wherein an intake hole of the inner box is provided at a central portion above a side surface of the inner box.